Electric bell



P. B. DELANY.

ELEGTRIG BELL.

(No Model.)

No. 431,181. Patented July 1, 1890.

FQWCQW 41 A TTOH/VEYS UNITED STATES PATENT OFFICE.

PATRICK B. DELANY, OF SOUTH ORANGE, NEW JERSEY.

ELECTRIC BELL.

SPECIFICATION forming part of Letters Patent No. 431,181, dated July 1, 1890.

Application at mini 17, 1890.

To all whom it may concern.-

Be it known that l, PATRICK B. DELANY, a citizen of the United States, residing at South Orange, New Jersey, have invented certain new and useful Improvements in Electric Bells, of which the following is a specification.

My invention relates to vibrating electric bells; and its purpose is to construct or provide them with an improved attachment, so that the clear ringing of the bell may at pleasure be muffled and the bell converted into a buzzer. In other words, my improved instrument is practically a combined electric bell and buzzer.

In the accompanying drawings, Figure 1 is a rear View of an electric bell with myinvention applied thereto, and Fig. 2 aside elevation of the same.

A is the case of an electric bell, either of wood, cast-iron, or other material, having the ordinary back plate and the box or cover B, within which the electro-magnet and vibrating armature-lever are mounted.

O is the bell-hammer, and D D the bindingscrews by which the current is lead through the instrument. There is nothing whatever peculiar in the construction of this part of the instrument, and the illustration serves as a representation of any ordinary vibratory electric bell.

My buzzer attachment consists of an improved device to be pressed against the bell to deaden its resonance.

I prefer to construct the instrument in the following manner: The screw f is screwed into the back plate of the bell; a coil-spring j" surrounds it, and between the spring and the back plate is the pivoted spring-ar1n F. The

$eria1No. 344,078. (No model.)

spring f serves to press the arm against the back-plate and to hold the spring-arm F in any position to which it is set. It also adds elasticity to the arm. The spring-arn1,wl1en placed in contact with the bell, rests firmly against it during its vibrations without tending to force it out of place. This arm F is offset at f so as to bring its outer portion f into the path of the edge of the bell. lVith the arm in the position shown in Figs. 1 and 2 the portion f is bearing upon the edge of the bell. Consequently its resonance is deadened and its sound will be analogous to that of the well-known electrical buzzer, and the instrument may therefore be used wherever a buzzer is desired. The arm F may be turned down until the portion f passes entirely out of contact with the edge of the bell, and then the bell will ring clearly with its full sound.

I claim as my invention 1. The combination of an electric bell and a spring-arm pivoted eccentrically of the axis or supporting-post of the bell to muflie its sound, substantially as set forth.

2. The combination of an electric bell, the mufiiing-arm pivoted within the bell near its supporting-post, and the spring bearing on the arm at its pivot.

3. The combination of an electric bell and a spring-actuated muffling attachment adapted to bear and rest on the bell, substantially as set forth.

In testimony whereof I have hereunto subscribed my name.

PATRICK B. DELANY.

Witnesses:

CHAS. O. ZUKSCHWERDT, MAMIE J. KELLEY. 

